From 0849d91d3cc0326537b4175841946a859191d8cc Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sun, 9 Jul 2017 10:03:32 +0200
Subject: made kernel boot with optimizations on (clang), reason where the use
 of MMX registers

---
 BUGS         | 4 +++-
 src/Makefile | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/BUGS b/BUGS
index 4b9930b..1104f2a 100644
--- a/BUGS
+++ b/BUGS
@@ -21,4 +21,6 @@
   outside of the library. Then in the libc test directory we have
   to implement a stub module for instance using some host functions
   like standard io of the host C library
-- code breaks heavily under O2 optimization with clang (at least)
+- VGA graphic mode switch fails with optimizations on (at least with
+  gcc and clang)
+  
diff --git a/src/Makefile b/src/Makefile
index 62909a1..3838b08 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,6 +1,6 @@
 CC := gcc
 INCLUDES = -I. -Ilibc -Ihardware -Idrivers -Idrivers/hdi -Idrivers/hdi/ps2 -Idrivers/video -Ikernel -Igui
-CFLAGS := -std=c99 -m32 -ffreestanding -O0 -g -Werror $(INCLUDES)
+CFLAGS := -std=c99 -m32 -march=i486 -ffreestanding -O0 -g -Werror $(INCLUDES)
 LD := ld
 NASMFLAGS := -f elf32
 NASM := nasm
-- 
cgit v1.2.3-54-g00ecf